Joist Designer V4.6.0

Project Parameters

Geometry

Span ft

Long side ft

Joist spacing o.c.

Loads

Floor loads

DL psf

LL psf

Depth in (blank = auto)

Point loads & checks

Concentrated loads (RTU / units) — lb @ % of span

Deflection limit (LL)

Snow drift psf

added to roof snow

Joist series

K-Series depth selection

Additional chord loads

Top chord UDL plf

Bot chord UDL plf

Top chord UDL — load type

Top chord UDL — serviceability

Joist self-weight treatment

Project

Grade

Camber

Edge joists

Advanced — optional, defaults keep results unchanged

Bearing & Ends›

Bearing type

Bearing length in (blank = auto)

Seat depth

Custom in

End configuration

Joist Configuration›

Profile

Bridging›

Bridging mode

Weight Calibration (internal)›

Fabrication allow. %

Calibration factor

Allowance = plates, welds, clips (× joist steel). Calibration factor is a commercial estimator adjustment applied to fabricated weight only — not to structural loads. Values load from the authenticated DeckCo server.

Project Information

Used in drawing title block and PDF output.

Drawing metadata only — does not affect calculations.

Framing/layout plan (PDF) — joists across the bay, supports, bridging, grids, dimensions & joist schedule; opens in Bluebeam.

CAD (DXF) exports — elevation & framing plan on named layers, true-scale inches; open in AutoCAD / BricsCAD / DraftSight. Internal mode only.

Internal Cost Settings (confidential)›

Saved defaults loaded from DeckCo server.

Material

Steel cost $/lb

Waste %

Fabrication

Fabrication pricing

Fabrication $/lb

Consumables

Consumables $/lb

Finish

Primer $/lb

Engineering / Detailing

Mode

Amount $

Freight

$/load

Truck cap. tons

Accessories (optional $)

Bridging acc.

Seats / ext.

Misc. accessories

Overhead & Pricing

Overhead %

Markup %

Markup = profit ÷ cost (markup on cost). Gross margin = profit ÷ sell price. These are DeckCo confidential assumptions loaded from the authenticated server — they are not present in the public page source.

Request a Quote

Fill in your details — download the PDF drawing and send it to DeckCo for a formal quotation.

Attach Drawings (architectural, structural — optional)

Drop files here or click to browse

PDF, DWG, DXF, PNG, JPG, TIFF, ZIP — max 20 MB each

Designations follow SJI K/LH/DLH-Series conventions. All designs are preliminary and must be reviewed and stamped by a licensed P.Eng. (Ontario) before fabrication or procurement.

© 2019–2026 8co Structural Inc., operating as DeckCo. All rights reserved. This tool, its design, output format, and drawings are the intellectual property of 8co Structural Inc. Engineering calculations reference SJI, CSA, NBC, and CISC standards. Output drawings are preliminary and require P.Eng. review. Unauthorized reproduction of this tool or its outputs for commercial purposes is prohibited.

Live Joist Drawing & Specifications

DECKCO — OPEN WEB STEEL JOIST —

NOT APPROVED FOR CONSTRUCTION — PRELIMINARY DESIGN — REQUIRES P.Eng. STAMP

Project

—

Client

—

Project No.

—

Address

—

Date

—

Drawing No.

S.00 — S.03

Sheets

S.01 | S.02 | S.03

Cover + TOC

S.00

Revision

P1 — Preliminary

Scale / Size

NTS / A3

Metric: —

Drawn by: DeckCo / 8co Structural Inc.

Checked by: P.Eng. (Ontario) — pending review

Estimated Designation Preliminary Estimate

—

Enter parameters on the left

Unit weight

—

Total steel

—

Wt / joist

—

Bridging rows

—

Layout Summary

Joists / level

—

Actual spacing

—

Requested spacing

—

Total joists

—

Field width (B)

—

Spaces

—

Edge offset L / R

—

Levels

—

Bay area: —

Joist Schedule — All Levels Auto-calculated per level

Joist Takeoff Add marks for a multi-joist estimate

Mark

Qty

Fabrication Pricing Preliminary selection — pricing on request

Detailed pricing is prepared by DeckCo. Download your preliminary drawing and request a formal fabrication quote — our team will confirm final designations, weights and pricing.

PRELIMINARY JOIST SELECTION — P.ENG. / JOIST MANUFACTURER REVIEW REQUIRED

Internal Commercial Estimate CONFIDENTIAL Pricing only — not an engineered design

Basis: current joist × qty

Table of Contents

DRG NO.	DESCRIPTION	SHEET
S.00	Cover Sheet, Table of Contents & General Notes	1 of 4
S.01	Preliminary Design — Elevation, Section, Seat Detail	2 of 4
S.02	Shop Fabrication Drawing — BOM, Details, Notes	3 of 4
S.03	Design Calculation Notebook — Codes & References	4 of 4

Legend

Top / Bottom Chord — 2L double angles (typ.)

Web Members — diagonal + vertical

Applied uniform load (UDL) — w plf

Section cut / reference line

Dimension line with tick marks

Bearing seat angle (typ. both ends)

HSS web member (LH / DLH Series)

SJI Weight Validation

Material Weight Breakdown

Elevation View — S.01 Schematic — not to scale

Joist Layout Plan — S.04 Plan view — not to scale

Cross-Section & Steel Shapes — S.01 Schematic — not to scale

Shop Fabrication Drawing — S.02 Preliminary — not for construction

Joist Specifications

Calculation Notebook — full auditable trace

Engineering Variable Guide›

Design Codes & References

All calculations in this tool are based on the following codes and standards. Click any link to open the official source.